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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00005252naa a2200697 4500
001oai:DiVA.org:kth-246566
003SwePub
008190528s2018 | |||||||||||000 ||eng|
009oai:DiVA.org:su-158534
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2465662 URI
0247 a https://doi.org/10.1175/JAS-D-18-0081.12 DOI
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1585342 URI
040 a (SwePub)kthd (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Li, Xiang-Yungu KTH,Nordic Institute for Theoretical Physics NORDITA4 aut0 (Swepub:kth)u1vtdwlg
2451 0a Effect of turbulence on collisional growth of cloud droplets
264 1b American Meteorological Society,c 2018
338 a print2 rdacarrier
500 a QC 20220323
520 a Weinvestigate the effect of turbulence on the collisional growth of micrometer-sized droplets through highresolution numerical simulations with well-resolved Kolmogorov scales, assuming a collision and coalescence efficiency of unity. The droplet dynamics and collisions are approximated using a superparticle approach. In the absence of gravity, we show that the time evolution of the shape of the droplet-size distribution due to turbulence-induced collisions depends strongly on the turbulent energy-dissipation rate ε, but only weakly on the Reynolds number. This can be explained through the « dependence of the mean collision rate described by the Saffman-Turner collision model. Consistent with the Saffman-Turner collision model and its extensions, the collision rate increases as ε1/2 even when coalescence is invoked. The size distribution exhibits power-law behavior with a slope of 23.7 from a maximum at approximately 10 up to about 40 mm. When gravity is invoked, turbulence is found to dominate the time evolution of an initially monodisperse droplet distribution at early times. At later times, however, gravity takes over and dominates the collisional growth. We find that the formation of large droplets is very sensitive to the turbulent energy dissipation rate. This is because turbulence enhances the collisional growth between similar-sized droplets at the early stage of raindrop formation. The mean collision rate grows exponentially, which is consistent with the theoretical prediction of the continuous collisional growth even when turbulence-generated collisions are invoked. This consistency only reflects the mean effect of turbulence on collisional growth. 
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Klimatforskning0 (SwePub)105012 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Climate Research0 (SwePub)105012 hsv//eng
653 a Clouds
653 a Turbulence
653 a Coalescence
653 a Drops
653 a Energy dissipation
653 a Reynolds number
653 a Size distribution
653 a Collision and coalescence
653 a Droplet dynamics
653 a Droplet size distributions
653 a High-resolution numerical simulation
653 a Kolmogorov scale
653 a Monodisperse droplets
653 a Power-law behavior
653 a Turbulent energy dissipation rate
653 a cloud droplet
653 a cloud microphysics
653 a computer simulation
653 a numerical model
653 a power law
653 a atmosfärvetenskap och oceanografi
7001 a Brandenburg, Axelu Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Nordiska institutet för teoretisk fysik (Nordita),Institutionen för astronomi,University of Colorado, USA4 aut0 (Swepub:su)brandenb
7001 a Svensson, Gunillau Stockholms universitet,Meteorologiska institutionen (MISU),Swedish e-Science Research Centre, Sweden; Global & Climate Dynamics, National Center for Atmospheric Research, USA4 aut0 (Swepub:su)gsven
7001 a Haugen, N. E. L.4 aut
7001 a Mehlig, B.4 aut
7001 a Rogachevskii, lgoru KTH,Nordic Institute for Theoretical Physics NORDITA4 aut0 (Swepub:kth)u1d6noho
7001 a Li, Xiang-Yuu Stockholms universitet,Meteorologiska institutionen (MISU),Nordiska institutet för teoretisk fysik (Nordita),Swedish e-Science Research Centre, Sweden; University of Colorado, USA4 aut0 (Swepub:su)xili
7102 a KTHb Nordic Institute for Theoretical Physics NORDITA4 org
7730 t Journal of the Atmospheric Sciencesd : American Meteorological Societyg 75:10, s. 3469-3487q 75:10<3469-3487x 0022-4928x 1520-0469
8564 u https://doi.org/10.1175/JAS-D-18-0081.1y Fulltext
8564 u https://arxiv.org/abs/1711.10062y arXiv:1711.10062
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246566
8564 8u https://doi.org/10.1175/JAS-D-18-0081.1
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-158534

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